Electrosurgical generators

ConMed Hyfrecator Plus: troubleshooting and error codes

The ServiceForge knowledge base holds 5 documented symptoms for the ConMed Hyfrecator Plus, with 7 ranked causes, 14 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Front Panel inoperative

Front panel controls non-functional

Ranked causes

1. Fuses F1 and F2 blown or missing (common)
2. Power switch faulty (occasional)

First check

Inspect fuses F1 and F2

Test point: Fuse positions F1, F2
Expected: Fuses present and intact

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

LED Display does not light

LED display fails to illuminate

Ranked causes

1. No low voltage supply; U1, U2, Q2-Q5 defective (occasional)
2. U56, S9, S4, S5, DPS1, S2, VR3, VR1 or VR3 defective (occasional)

First check

Measure DC voltage at TP5

Test point: TP5
Expected: 55 V DC
Tools: DMM

3 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Display reads 0, will not go up in number with UP/DOWN Switches

Display shows zero and does not increment when UP/DOWN switches activated

Ranked causes

1. U56, S9, S4, VR3, DPS1 or S2 defective (occasional)

First check

Measure voltage at TP51

Test point: TP51
Expected: +5 V DC
Tools: DMM

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No output power with defective sound and DS5 illuminates high voltage

No output power present; defective sound heard; DS5 LED illuminates

Ranked causes

1. Transformer T1 is defective (occasional)

First check

Measure AC voltage at transformer T1 pins 10-12

Test point: T1 pins 10-12
Expected: 22 V AC
Tools: DMM

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

No sound when unit activated

Audible tone absent when unit activated via handswitch or footswitch

Ranked causes

1. U55, I, LS1 or R25 defective (occasional)

First check

Measure waveform at TP55

Test point: TP55
Expected: Audio waveform present when unit activated
Tools: Oscilloscope

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.